strings.cstringrefs: fix 'index' to return Char instead of Int8.
strings.cstringrefs: fix 'index' to return Char instead of Int8.

jckarter/clay,aep/clay,aep/clay,mario-campos/clay,mario-campos/clay,aep/clay,iamrekcah/clay,aep/clay,aep/clay,mario-campos/clay,iamrekcah/clay,iamrekcah/clay,jckarter/clay,iamrekcah/clay,mario-campos/clay,mario-campos/clay,jckarter/clay,jckarter/clay,aep/clay,jckarter/clay,iamrekcah/clay,jckarter/clay